The consistency of upper and lower approximation reduction is proved to hold, however, that of maximum distribution, distribution, and ordered assignment reduction does not through counterexamples.
证明了上下近似约简具有属性保留性，通过反例说明了分布约简、最大分布约简、分配序约简都不具有属性保留性。
参考来源 - 基于粗糙集的不完备信息系统知识获取理论与方法·2,447,543篇论文数据，部分数据来源于NoteExpress
Much valuable but hidden information can be discovered from decision tables associated with compatible reduction and lower approximation reduction based on dominance relation.
定义了决策表在优势关系下的相容约简和下近似约简，优势关系下的相容约简是优势关系下一致决策表约简的推广。
The quality of approximation is as good as polygonal boundary reduction, and it can process the data online in a constant buffer.
算法具有多边形约简算法相同的优良的近似质量，并可在固定数据缓冲区空间内在线运算。
On the other hand, by adjusting the given vertices, an approximation method for degree reduction of bezier curve is presented and the error is estimated.
另外，利用顶点位置的调整，给出一条降阶曲线逼近原曲线的方法，同时考虑了它们的误差。
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